300 was the hugely successful adaptation of the cult graphic novel series by Frank Miller and Lynn Varley set in ancient Greece, featuring an epic array of Persians, Spartans and Greeks.

300: Battle of Artemisia is a prequel centred around the Persian King, Xerxes.

Calisto, a 16 year old whose desire to become the heroic man/soldier his father was, leads him to become the leader of a small band of soldiers. The film will also star Eva Green as Artemisia, and Australian actor Sullivan Stapleton as Themistocles.